锂原子能级和光学振子强度的相对论性理论研究  

Relativistic treatment for energy levels and oscillator strength of the lithium atom

作　　者：王泽[1] 屈一至[1] 胡骁骊[1] 

机构地区：[1]中国科学院研究生院材料科学与光电技术学院,北京100049

出　　处：《中国科学院研究生院学报》2012年第4期439-448,共10页Journal of the Graduate School of the Chinese Academy of Sciences

基　　金：国家自然科学基金(10876043)资助

摘　　要：应用相对论多通道理论,计算锂原子1s2ns2S,1s2np2P,1s2nd2D和1s2nf2F系列束缚态和相邻连续态的本征量子数亏损,并拟合得到量子亏损函数,进而计算1s2np2P系列n=7～60的电离能和量子数亏损,计算结果与最新的实验值相符合.采用相对论多组态相互作用方法计算锂原子1s22s→1s2np1/2偶极跃迁光学振子强度,结果表明,通过包含单、双电子激发组态考虑电子关联作用,计算结果有很大的改善.Relativistic multichannel theory is used to calculate eigen quantum defects of 1s^2ns 2S,1s^2np 2P,1s^2nd 2D,and 1s^2nf 2F of lithium,and then the quantum defect functions are fitted.Ionization potentials and quantum defects of 1s^2np ^2P（n=7-60） are obtained,and the results are in good agreement with the latest experiment.Using the relativistic configuration interaction method,the dipole transition oscillator strength of 1s^22s→1s^2np1/2 are also calculated,and the calculations show that inclusion of one-and two-electron excitation configurations will significantly improve the results.

关 键 词：相对论多通道理论 组态相互作用理论 量子数亏损 光学振子强度 

分 类 号：O562[理学—原子与分子物理]